8 research outputs found
Bivalves lĂmnicos da bacia do rio dos Sinos, Rio Grande do Sul, Brasil (Bivalvia, Unionoida, Veneroida e Mytiloida)
OcorrĂȘncia de Puma concolor (Linnaeus) (Felidae, Carnivora) em ĂĄreas de vegetação remanescente de Santa Catarina, Brasil
The Oldest Lower Upper Cretaceous Plesiosaurs (Reptilia, Sauropterygia) from Southern Patagonia, Argentina
Sinopse das espécies de Menticirrhus Gill, 1861 (Osteichthyes, Sciaenidae) do Atlùntico Ocidental
Discute-se a nomenclatura e a taxonomia das espĂ©cies de Menticirrhus Gill, 1861 (Sciaenidae) do AtlĂąntico Ocidental. As formas mencionadas na literatura foram reexaminadas para serem atribuĂdas Ă s duas espĂ©cies achadas nas costas do Brasil, M. americanus (L.) e M. littoralis (Holbrook). ReferĂȘncias a M. littoralis sĂŁo frequentemente feitas, na literatura de autores sul-americanos, sob o nome de M. martinicensis Cuvier.<br>The taxonomy and nomenclature of the Western Atlantic species of Menticirrhus Gill, 1861 (Sciaenidae) are discussed. Forms mentioned in the past literature have been reexamined to be atributed to one of the two species that occur along the Brazilian coast: M. americanus (L.) and M. littoralis (Holbrook). References to M. littoralis, frequently mentioned in the literature by South American authors, actually refer to M. littoralis
Taxonomia e variação geogrĂĄfica das espĂ©cies do gĂȘnero Alouatta LacĂ©pĂšde (Primates, Atelidae) no Brasil Taxonomy and geographic variation of species of the genus Alouatta LacĂ©pĂšde (Primates, Atelidae) in Brazil
Neste estudo analisou-se a variação geogrĂĄfica e nĂŁo-geogrĂĄfica de tĂĄxons de bugios, gĂȘnero Alouatta LacĂ©pĂšde, 1799, que ocorrem no Brasil, com o objetivo de esclarecer a taxonomia do grupo. Para a anĂĄlise morfolĂłgica, examinou-se um total de 1.286 espĂ©cimes mantidos em cinco museus brasileiros e dois norte-americanos. O material consistiu basicamente de peles, crĂąnios e ossos hiĂłides; esqueletos e espĂ©cimes preservados em via Ășmida foram escassos. O estudo se baseou na anĂĄlise qualitativa dos complexos morfolĂłgicos em adição a 18 morfomĂ©ticos do crĂąnio e osso hiĂłide. Antes das decisĂ”es taxonĂŽmicas, elaborou-se um estudo de variação geogrĂĄfica, sexual, ontogenĂ©tica e individual. Reconheceu-se 10 espĂ©cies de Alouatta ocorrendo no Brasil, sendo a maioria definida por caracteres discretos, porĂ©m diagnĂłsticos. SĂŁo elas: Alouatta caraya (Humboldt, 1812), A. fusca (Geoffroy Saint-Hilaire, 1812), A. clamitans Cabrera, 1940, A. belzebul (Linnaeus, 1766), A. discolor (Spix, 1823), A. ululata Elliot, 1912; A. juara (Linnaeus, 1766), A. macconnelli (Humboldt, 1812), A. puruensis Lönnberg, 1941 e A. nigerrima Lönnberg, 1941. Alouatta macconnelli e A. clamitans mostraram notĂĄvel variação geogrĂĄfica na coloração da pelagem e algumas variĂĄveis morfomĂ©tricas (polimorfismo) o que dificultou as definiçÔes e limites dos tĂĄxons. Alouatta belzebul apresentou variação em mosaico na coloração da pelagem. Alouatta ululata e A. puruensis foram definidas pela presença de dicromatismo sexual na pelagem, mas este carĂĄter pode ser um artefato e necessita estudos adicionais para corroborar sua validade. Sinonimizou-se Alouatta belzebul mexianae Hagmann, 1908 com A. discolor; e a validade de Alouatta seniculus amazonica Lönnberg 1941, nĂŁo foi considerada.<br>In this monograph, was studied non-geographic and geographic variation of taxa of Howling Monkeys, genus Alouatta LacĂ©pĂšde, 1799, occuring in Brazil, in order to solve the taxonomy of the group. For the morphological analysis, were examined a total of 1,286 specimens kept in five Brazilian and two North-American museums. The material consisted mostly of skin, skull and hyoid bone; skeleton or fluid-preserved specimens were scarse. The study was based on qualitative analysis of the morphological complexes in addition 18 morphometric characters of the skull and hyoid bone. Prior to making taxonomic decisions, was conducted a study of geographic, sexual, ontogenetic, and individual variation. Were recognized ten species of Alouatta occuring in Brazil and most of them were defined by discrete, but diagnostic characters. The species are: Alouatta caraya (Humboldt, 1812), A. fusca (Geoffroy Saint-Hilaire, 1812), A. clamitans Cabrera, 1940, A. belzebul (Linnaeus, 1766), A. discolor (Spix, 1823), A. ululata Elliot, 1912; A. juara (Linnaeus, 1766), A. macconnelli (Humboldt, 1812), A. puruensis Lönnberg, 1941, and A. nigerrima Lönnberg, 1941. Alouatta macconnelli and A. clamitans showed noticeable geographic variation on pelage coloration and some morphometric characters (polymorphism) difficulting their definition and geographic limits. Alouatta belzebul presented an accentuated geographic mosaic variation on coat coloration. Alouatta ululata and A. puruensis were defined in presenting sexual dicromism on pelage, but this character can be an artefate due the small sample and both taxa need further studies to confirm their validity. Alouatta belzebul mexianae Hagmann, 1908 was sinonimized with A. discolor; and the validity of Alouatta seniculus amazonica Lönnberg 1941 was not considered